2087435440681 has 2 divisors, whose sum is σ = 2087435440682. Its totient is φ = 2087435440680.

The previous prime is 2087435440633. The next prime is 2087435440723. The reversal of 2087435440681 is 1860445347802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1595320563600 + 492114877081 = 1263060^2 + 701509^2 .

It is a cyclic number.

It is not a de Polignac number, because 2087435440681 - 2³⁵ = 2053075702313 is a prime.

It is a super-2 number, since 2×2087435440681² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2087435444681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043717720340 + 1043717720341.

It is an arithmetic number, because the mean of its divisors is an integer number (1043717720341).

Almost surely, 2^{2087435440681} is an apocalyptic number.

It is an amenable number.

2087435440681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2087435440681 is an equidigital number, since it uses as much as digits as its factorization.

2087435440681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5160960, while the sum is 52.

The spelling of 2087435440681 in words is "two trillion, eighty-seven billion, four hundred thirty-five million, four hundred forty thousand, six hundred eighty-one".